Harpie Dancer

If when you summon this card (including Special Summon) you control face-up "Harpie Lady" cards, activate these effects: At least 1: this card can attack while it is on Defense Position; At least 2: your opponent cannot selec your "Harpie Lady"s as an attack target; At least 3 OR more: the ATK of this card will be equal to the sum of the ATK and DEF of this card.